Ecosystem Test

Result

Ecosystem Test - 29

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which one is more permanent ecosystem?

A
Forest

B
Mountain

C
Desert

D
Sea
Solution
- The permanent ecosystem is long lived and self-supported natural ecosystem for very long period. Example includes forest, river etc.
- But in comparison sea is more permanent than forest.
- A large proportion of all life on Earth exists in the oceans which provide 300 times as much habitable volume as terrestrial habitats.
- Marine habitats range from surface water to the deepest oceanic trenches, including coral reefs, seagrass meadows, muddy, sandy and rocky bottoms, and the open pelagic zone.
Thus, the correct answer is option D.
Question 2
1 / -0

Cycling of elements in any ecosystem is called as

A
Chemical cycle

B
Geochemical cycle

C
Biogeochemical cycle

D
Geological cycle

Solution

In earth science, a biogeochemical cycle or substance turn over or cycling of substances is a pathway by which a chemical substance moves through both biotic and abiotic (lithosphere, atmosphere and hydrosphere) compartments of Earth. A cycle is a series of change, which comes back to the starting point and which can be repeated.
Question 3
1 / -0

The utilization of elements and compounds in nature and their subsequent return to the environment is called

A
Life cycles

B
Cyclic pathway

C
Material cycles

D
Recycling

Solution

The utilisation of elements and compounds in nature and their subsequent return to the environment is called material cycles. It is also called as a biogeochemical cycle.
In biology, a life cycle is a series of changes in form that an organism undergoes, returning to the starting state.
Recycle is the conversion of waste into useful forms.
Cyclic pathways tend to use the last product they create to re-begin the cycle.
So, the correct answer is option C.
Question 4
1 / -0

Biogeochemical cycling means cycling of

A
Energy in ecosystem

B
Gases between plants and the atmosphere

C
Nutrients in an ecosystem

D
None of the above

Solution

Biogeochemical cycle is a pathway by which a chemical substance moves through both biotic and abiotic compartments of earth. The circulation of chemical nutrients like carbon, oxygen, nitrogen, phosphorus, calcium and water, etc., through the biological and physical world are known as biogeochemical cycles. In effect, the element is recycled, although in some cycles there may be places where the element is accumulated or held for a long period of time.
Question 5
1 / -0

Which one of the following atoms often limit the primary productivity of an ecosystem?

A
Carbon

B
Nitrogen

C
Phosphorus

D
Sulphur

Solution

Carbon is the element which limits the productivity of ecosystem. Carbon dioxide is the gas which is absorbed by plants for the process of photosynthesis. As a result of photosynthesis, CO$$_{2}$$ is converted into glucose, which is the energy produced for the plants as well as the heterotrophs which depend on autotrophic plants. The availability of carbon element determines the rate of photosynthesis, which is an important process in the release of oxygen, being used by other organisms surviving on earth.
Question 6
1 / -0

As energy is passed from one trophic level to another, the amount of usable energy?

A
Increases

B
Decreases

C
Remains the same

D
Energy is not passed from one tropical level to another

Solution

The transfer of energy from one trophic level to next trophic level follows 10 percent law known as Lindeman's law of trophic efficiency which states that the efficiency of energy transferred from one trophic level to the next higher trophic level is about 10%. Rest of the energy is lost in respiration. So the energy decreases as it is transferred to subsequent trophic levels.
So, the correct answer is option B.
Question 7
1 / -0

Who coined the term ecosystem?

A
Tansley

B
Odum

C
Warming

D
Darwin

Solution

A. Arthur George Tansley coined the term ecosystem' in 1935 to describe the interactions between organisms and with their environment.
B. Odum was an American biologist who worked on ecosystem ecology and wrote the book 'Fundamentals of ecology'.
C. Eugenius warming was the first to write a textbook on plant ecology. He gave the concept and content on ecology.
D. Darwin gave a theory of natural selection which states that only fittest individuals are selected by nature and unfit ones are eliminated.
So, the correct answer is 'Tansley'.
Question 8
1 / -0

Which of the following is an example of secondary succession?

A
Vegetation developing on a bare rock

B
Vegetation developing following forest fire

C
Fungus growing on a banana peel

D
Conversion of pond into a crop field by humans

Solution

Secondary succession is the sequence of changes that happens on a previously colonized but damaged habitat. The forests fires have resulted in the destruction of the habitat which was present at a time. The development of new vegetation after forest fire is an example of secondary succession.
Thus, the correct answer is option B.
Question 9
1 / -0

In an ecosystem, the population of

A
Primary producers is larger than primary consumers.

B
Secondary consumers is largest.

C
Primary consumers out numbers primary producers.

D
Primary consumers are least dependent upon primary producers.

Solution

The bottom of the biomass pyramid represents the primary producers (autotrophs). The primary producers trap energy from the sunlight or inorganic chemicals and use it to create energy-rich molecules such as carbohydrates. This mechanism is called as primary production. When energy is transferred from one trophic level to the next, typically only ten percent is used to build new biomass. The remaining ninety percent goes to metabolic processes or is dissipated as heat. The primary consumers are arranged above the producers as because they are less in number. Hence, the correct answer is option A.
Question 10
1 / -0

The phosphorus cycle differs from those of carbon and nitrogen as well as those of sulphur, oxygen and hydrogen in that it lacks

A
Water

B
Dust particles

C
Gaesous phase

D
All of the above

Solution

Phosphorus cycle differs from the other cycles that it locks the gaseous phase. Although small amount of phosphoric acid $$(H_3 PO_4)$$ may make their way into the atmosphere contributing in some cases - to acid rain. It is the slowest cycle amongst the all cycles.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Ecosystem Test - 29

Result

Ecosystem Test - 29

Score

-

Rank

-

SHARING IS CARING

Question 1

Forest

Mountain

Desert

Sea

Solution

Question 2

Chemical cycle

Geochemical cycle

Biogeochemical cycle

Geological cycle

Solution

Question 3

Life cycles

Cyclic pathway

Material cycles

Recycling

Solution

Question 4

Energy in ecosystem

Gases between plants and the atmosphere

Nutrients in an ecosystem

None of the above

Solution

Question 5

Carbon

Nitrogen

Phosphorus

Sulphur

Solution

Question 6

Increases

Decreases

Remains the same

Energy is not passed from one tropical level to another

Solution

Question 7

Tansley

Odum

Warming

Darwin

Solution

Question 8

Vegetation developing on a bare rock

Vegetation developing following forest fire

Fungus growing on a banana peel

Conversion of pond into a crop field by humans

Solution

Question 9

Primary producers is larger than primary consumers.

Secondary consumers is largest.

Primary consumers out numbers primary producers.

Primary consumers are least dependent upon primary producers.

Solution

Question 10

Water

Dust particles

Gaesous phase

All of the above

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.